Aluminium bar weight chart: round, square and flat bar in 6082, 6061 and 7075 (kg/m)
Weight per metre of aluminium round bar in 6082, 6061 and 7075 and of square and flat bar, with the formulas and the weight of a 3 m or 6 m bar.
Updated October 18, 2026
Weight per metre for the aluminium bars in our range: round bar in 6082, 6061 and 7075, square bar and flat bar. Use the tables to estimate the weight of a cutting list or a shipment; tubes, angles and channels are in the aluminium profile size tables.
How aluminium bar weight is calculated
Aluminium weighs about a third as much as steel. The tables use 2.70 kg/dm³ for 6082 and 6061 and 2.81 kg/dm³ for 7075, the zinc-alloyed high-strength grade. The differences between the alloys are explained in the aluminium alloy guide.
- Round bar — d² × 0.002121 = kg/m for 6082 and 6061 (d² × 0.002207 for 7075). A Ø50 bar in 6082 weighs 2500 × 0.002121 = 5.30 kg/m.
- Square bar — a² × 0.0027 = kg/m. A 40 mm square bar weighs 4.32 kg/m.
- Flat bar — width × thickness × 0.0027 = kg/m. A 50 × 10 flat bar weighs 1.35 kg/m.
Aluminium round bar weight
| Diameter (mm) | 6082 kg/m | 6061 kg/m | 7075 kg/m |
|---|---|---|---|
| 13 | 0.358 | – | – |
| 20 | 0.848 | – | 0.883 |
| 25 | 1.33 | – | 1.38 |
| 30 | 1.91 | – | 1.99 |
| 35 | 2.60 | – | – |
| 40 | 3.39 | 3.39 | 3.53 |
| 45 | – | 4.29 | 4.47 |
| 50 | 5.30 | 5.30 | 5.52 |
| 55 | – | – | 6.68 |
| 60 | 7.63 | 7.63 | – |
| 65 | 8.96 | 8.96 | 9.32 |
| 70 | 10.39 | 10.39 | 10.81 |
| 80 | 13.57 | 13.57 | 14.12 |
| 90 | 17.18 | 17.18 | 17.88 |
| 100 | 21.21 | – | – |
| 110 | 25.66 | 25.66 | 26.70 |
| 120 | – | 30.54 | 31.78 |
| 130 | 35.84 | – | 37.30 |
| 140 | – | 41.56 | 43.26 |
| 145 | – | – | 46.40 |
| 150 | 47.71 | – | – |
| 160 | 54.29 | 54.29 | – |
| 170 | 61.28 | 61.28 | – |
| 180 | 68.71 | 68.71 | – |
| 190 | 76.55 | – | 79.67 |
| 200 | 84.82 | 84.82 | 88.28 |
| 210 | 93.52 | 93.52 | – |
| 220 | 102.6 | 102.6 | – |
| 250 | 132.5 | 132.5 | – |
| 260 | – | 143.4 | – |
| 270 | – | 154.6 | – |
6082 and 6061 have the same density, so a bar of the same diameter weighs the same in either alloy; 7075 is about 4% heavier. Standard stock length is 3 m, so a 3 m bar weighs three times the figure in the table.
Aluminium square bar weight
| Size (mm) | kg/m | 3 m bar (kg) |
|---|---|---|
| 10×10 | 0.270 | 0.810 |
| 12×12 | 0.389 | 1.17 |
| 15×15 | 0.608 | 1.82 |
| 20×20 | 1.08 | 3.24 |
| 25×25 | 1.69 | 5.06 |
| 30×30 | 2.43 | 7.29 |
| 40×40 | 4.32 | 12.96 |
| 45×45 | 5.47 | 16.40 |
| 50×50 | 6.75 | 20.25 |
| 60×60 | 9.72 | 29.16 |
| 70×70 | 13.23 | 39.69 |
| 80×80 | 17.28 | 51.84 |
| 90×90 | 21.87 | 65.61 |
| 100×100 | 27.00 | 81.00 |
Aluminium flat bar weight
| Width × thickness (mm) | kg/m | 6 m bar (kg) |
|---|---|---|
| 10×10 | 0.270 | 1.62 |
| 15×10 | 0.405 | 2.43 |
| 15×15 | 0.608 | 3.65 |
| 20×10 | 0.540 | 3.24 |
| 20×15 | 0.810 | 4.86 |
| 20×20 | 1.08 | 6.48 |
| 25×15 | 1.01 | 6.07 |
| 25×25 | 1.69 | 10.12 |
| 30×10 | 0.810 | 4.86 |
| 30×15 | 1.22 | 7.29 |
| 30×20 | 1.62 | 9.72 |
| 30×30 | 2.43 | 14.58 |
| 40×10 | 1.08 | 6.48 |
| 40×15 | 1.62 | 9.72 |
| 40×20 | 2.16 | 12.96 |
| 40×25 | 2.70 | 16.20 |
| 40×30 | 3.24 | 19.44 |
| 40×40 | 4.32 | 25.92 |
| 50×10 | 1.35 | 8.10 |
| 50×15 | 2.02 | 12.15 |
| 50×20 | 2.70 | 16.20 |
| 50×25 | 3.38 | 20.25 |
| 50×30 | 4.05 | 24.30 |
| 50×35 | 4.73 | 28.35 |
| 50×40 | 5.40 | 32.40 |
| 50×50 | 6.75 | 40.50 |
| 60×10 | 1.62 | 9.72 |
| 60×15 | 2.43 | 14.58 |
| 60×20 | 3.24 | 19.44 |
| 60×25 | 4.05 | 24.30 |
| 60×30 | 4.86 | 29.16 |
| 60×40 | 6.48 | 38.88 |
| 60×50 | 8.10 | 48.60 |
| 60×60 | 9.72 | 58.32 |
| 70×10 | 1.89 | 11.34 |
| 70×15 | 2.83 | 17.01 |
| 70×20 | 3.78 | 22.68 |
| 70×30 | 5.67 | 34.02 |
| 70×40 | 7.56 | 45.36 |
| 70×50 | 9.45 | 56.70 |
| 70×60 | 11.34 | 68.04 |
| 70×70 | 13.23 | 79.38 |
| 80×10 | 2.16 | 12.96 |
| 80×15 | 3.24 | 19.44 |
| 80×20 | 4.32 | 25.92 |
| 80×25 | 5.40 | 32.40 |
| 80×30 | 6.48 | 38.88 |
| 80×40 | 8.64 | 51.84 |
| 80×50 | 10.80 | 64.80 |
| 80×60 | 12.96 | 77.76 |
| 80×70 | 15.12 | 90.72 |
| 80×80 | 17.28 | 103.7 |
| 90×90 | 21.87 | 131.2 |
| 100×10 | 2.70 | 16.20 |
| 100×15 | 4.05 | 24.30 |
| 100×20 | 5.40 | 32.40 |
| 100×25 | 6.75 | 40.50 |
| 100×30 | 8.10 | 48.60 |
| 100×40 | 10.80 | 64.80 |
| 100×60 | 16.20 | 97.20 |
| 100×100 | 27.00 | 162.0 |
| 110×110 | 32.67 | 196.0 |
| 120×10 | 3.24 | 19.44 |
| 120×15 | 4.86 | 29.16 |
| 120×20 | 6.48 | 38.88 |
| 120×30 | 9.72 | 58.32 |
| 120×120 | 38.88 | 233.3 |
| 130×25 | 8.78 | 52.65 |
| 150×10 | 4.05 | 24.30 |
| 150×20 | 8.10 | 48.60 |
Flat bar is cut to length up to 6 m, so the last column gives the weight of a full 6 m length.
How much does an aluminium round bar weigh per metre?
Multiply the diameter squared by 0.002121 for 6082 or 6061. A Ø30 bar weighs 900 × 0.002121 = 1.91 kg/m; a Ø100 bar weighs 21.21 kg/m.
Is aluminium bar lighter than steel bar?
Yes. At 2.70 kg/dm³ against 7.85 kg/dm³, an aluminium bar weighs about 34% of a steel bar of the same size.
Why is 7075 heavier than 6082?
7075 contains zinc, magnesium and copper and has a density of about 2.81 kg/dm³, against 2.70 kg/dm³ for 6082, so the same bar weighs about 4% more.
Do the tables match the delivered weight exactly?
The tables use nominal sizes. Extrusion tolerances make real bars a little heavier or lighter, so invoices are based on the weighed or calculated weight agreed in the order.
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